Actuating a Power-Electronics DC-DC Converter

Abstract

A method for actuating a power-electronics DC-DC converter that is operated by a controller and has a primary side with at least two electronic switches and a secondary side, galvanically isolated therefrom, with at least one electronic switch, wherein in the method, a reference variable and/or control parameters for the controller is/are adjusted by a BWHH algorithm. Also disclosed are a controller for controlling a power-electronics DC-DC converter that is configured to carry out the method.

1 - 11 . (canceled) 
     
     
         12 . A method for actuating a power-electronics DC voltage converter that is operated by a controller, having a primary side with at least two electronic switches and a secondary side, which is galvanically isolated from the primary side, with at least one electronic switch, the method comprising:
 adjusting at least one reference variable and/or control parameters for the controller via a BWHH algorithm.   
     
     
         13 . The method according to  claim 12 ,
 wherein the DC voltage converter is controlled by a cascaded current-voltage controller, and   wherein the adjustable control parameters comprise control parameters of a current controller and/or control parameters of a voltage controller.   
     
     
         14 . The method according to  claim 12 , comprising:
 calculating a duty cycle loss and/or an additional voltage via the BWHH algorithm using the following input variables:
 an input voltage at a primary side of the DC voltage controller; 
 a duty cycle; 
 an output voltage at the secondary side of the DC voltage converter; and 
 an output current at the secondary side of the DC voltage converter. 
   
     
     
         15 . The method according to  claim 14 , comprising:
 using the BWHH algorithm and the input variables:
 calculating a ripple current; 
 calculating, from the ripple current, an initial value for a current in a primary side transformer half-unit, or a corresponding stray inductance; 
 successively calculating, for each phase of a switching scheme of the DC voltage converter, the current; and 
 at an end of a final phase of the switching scheme, calculating the duty cycle loss and/or the additional voltage therefrom. 
   
     
     
         16 . The method according to  claim 12 ,
 wherein the at least one reference variable corresponds to a reference time delay which is calculated as function of a duty cycle loss, which is calculated using the BWHH algorithm, wherein the reference time delay represents a measure of a delayed switching of the at least one electronic switch on the secondary side.   
     
     
         17 . The method according to  claim 12 ,
 wherein the DC voltage converter comprises a primary side having a full-bridge with four electronic switches and a secondary side with two electronic switches, wherein the primary side and the secondary side are galvanically isolated from one another by a transformer.   
     
     
         18 . The method according to  claim 17 , wherein the DC voltage converter is a phase-shifted full-bridge. 
     
     
         19 . A controller for controlling a power-electronics DC voltage converter having a primary side with at least two electronic switches and a secondary side, which is galvanically isolated from the primary side, with at least one electronic switch, wherein the controller is configured to:
 adjust at least one reference variable and/or control parameters for the controller via a BWHH algorithm.   
     
     
         20 . The controller according to  claim 19 ,
 wherein the DC voltage converter is controlled by a cascaded current-voltage controller, and   wherein the adjustable control parameters comprise control parameters of a current controller and/or control parameters of a voltage controller.   
     
     
         21 . The controller according to  claim 19 , wherein the controller is configured to:
 calculate a duty cycle loss and/or an additional voltage via the BWHH algorithm using the following input variables:
 an input voltage at a primary side of the DC voltage controller; 
 a duty cycle; 
 an output voltage at the secondary side of the DC voltage converter; and 
 an output current at the secondary side of the DC voltage converter. 
   
     
     
         22 . The controller according to  claim 21 , wherein the controller is configured to:
 using the BWHH algorithm and the input variables:
 calculate a ripple current; 
 calculate, from the ripple current, an initial value for a current in a primary side transformer half-unit, or a corresponding stray inductance; 
 successively calculate, for each phase of a switching scheme of the DC voltage converter, the current; and 
 at an end of a final phase of the switching scheme, calculate the duty cycle loss and/or the additional voltage therefrom. 
   
     
     
         23 . The controller according to  claim 19 ,
 wherein the at least one reference variable corresponds to a reference time delay which is calculated as function of a duty cycle loss, which is calculated using the BWHH algorithm, wherein the reference time delay represents a measure of a delayed switching of the at least one electronic switch on the secondary side.   
     
     
         24 . A vehicle comprising:
 at least one power-electronics DC voltage converter having a primary side with at least two electronic switches and a secondary side, which is galvanically isolated from the primary side, with at least one electronic switch; and   the controller according to  claim 19 .   
     
     
         25 . The vehicle according to  claim 24 ,
 wherein the DC voltage converter is configured to convert a voltage between two on-board electrical energy sub-systems of the vehicle having different voltage levels.   
     
     
         26 . The vehicle according to  claim 24 , wherein the vehicle is an electric vehicle. 
     
     
         27 . The vehicle according to  claim 24 ,
 wherein the DC voltage converter comprises a primary side having a full-bridge with four electronic switches and a secondary side with two electronic switches, wherein the primary side and the secondary side are galvanically isolated from one another by a transformer.   
     
     
         28 . The vehicle according to  claim 24 , wherein the DC voltage converter is a phase-shifted full-bridge.